Box of battery, battery, power consumption apparatus, method for producing battery and apparatus for producing battery

ABSTRACT

An embodiment of the present application is provided with a battery box, a battery, a power consumption device, and a method for producing a battery and an apparatus for producing a battery. The box of the battery includes: an electrical chamber, configured to accommodate a battery cell group; a collection chamber, configured to collect emissions of the battery cell provided with the pressure relief mechanism when the pressure relief mechanism is actuated; an isolation component for isolating the electrical chamber and the collection chamber, such that the electrical chamber and the collection chamber are arranged on both sides of the isolation component; wherein a surface of the isolation component that is close to the battery cell group is provided with an avoidance opening, the avoidance opening extends along the first direction, and the plurality of pressure relief mechanisms of the battery cell group face the avoidance opening.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2021/082464, filed on Mar. 23, 2021, the disclosure of which ishereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present application relates to the field of battery technologies,and in particular, to a box of battery, a battery, a power consumptionapparatus, a method for producing battery and an apparatus for producingbattery.

BACKGROUND

Energy saving and emission reduction are the key to the sustainabledevelopment of the automotive industry. In this case, electric vehicleshave become an important part of the sustainable development of theautomotive industry due to their advantages of energy conservation andenvironmental protection. For electric vehicles, the battery technologyis also an important factor for their development.

During the development of the battery technology, in addition to improvethe performance of a battery, safety is also an issue that cannot beignored. If the safety of the battery cannot be ensured, then thebattery cannot be used. Therefore, how to enhance the safety of thebattery is an urgent technical problem to be solved in the batterytechnology.

SUMMARY

The present application is provided with a box of battery, a battery, apower consumption apparatus, and a method for producing a battery and anapparatus for producing a battery, which can enhance the safety of thebattery.

In a first aspect, a box of battery is provided, including: anelectrical chamber, configured to accommodate a battery cell group,where the battery cell group includes a plurality of battery cellsarranged along a first direction, at least two battery cells of theplurality of battery cells include respectively a pressure reliefmechanism, the pressure relief mechanism is disposed on a first wall ofthe battery cell, and the pressure relief mechanism is configured to beactuated when internal pressure or a temperature of the battery cellreaches a threshold value to relieve the internal pressure; a collectionchamber, configured to collect emissions of the battery cell providedwith the pressure relief mechanism when the pressure relief mechanism isactuated; an isolation component, configured to isolate the electricalchamber from the collection chamber, such that the electrical chamberand the collection chamber are arranged on both sides of the isolationcomponent; where the first wall is attached to the isolation component,a surface of the isolation component that is close to the battery cellgroup is provided with an avoidance opening, the avoidance openingextends along the first direction, and the plurality of pressure reliefmechanisms of the battery cell group face the avoidance opening.

In the technical solution of the embodiment of the present application,the isolation component is used to separate the electrical chamber foraccommodating the battery cell and the collection chamber for collectingthe emissions. When the pressure relief mechanism is actuated, theemissions of the battery cell enter the collection chamber instead ofthe electrical chamber, or a small amount of the emissions enter theelectrical chamber, so that the electrical connection component in theelectrical chamber is not conductive and short-circuited, and thereforethe safety of the battery can be enhanced. By providing the avoidanceopening corresponding to the pressure relief mechanism of the batterycell group in the box of the battery, the pressure relief mechanism isprevented from being blocked, and the pressure relief mechanism isensured to be able to smoothly discharge the emissions. At the sametime, compared with the solution that each pressure relief mechanism isin one-to-one correspondence with each avoidance opening (this solutionhas extremely high requirements to assembly, if a cumulative toleranceof the assembly exceeds an allowable range, the pressure reliefmechanism of some battery cells will not be aligned with thecorresponding avoidance opening, thereby being blocked by the isolationcomponent, therefore the emissions are not discharged smoothly when thepressure relief mechanism is actuated, and in extreme cases, the batterycell will explode because the pressure is not relieved in time). Byproviding the avoidance opening extending along the first direction, andmaking all of the plurality of pressure relief mechanisms of the batterycell group face the avoidance openings, the difficulty of aligning thepressure relief mechanism with the avoidance opening can be greatlyreduced, thereby preventing the pressure relief mechanism from beingblocked.

In some embodiments, all of the pressure relief mechanisms of thebattery cell group face the avoidance opening.

Since all of the pressure relief mechanisms of the battery cell group inthe embodiment of the present application can face the avoidanceopenings, such that when all of the pressure relief mechanisms areactuated, their emissions can smoothly pass through the avoidanceopenings and enter the collection chamber, thereby ensuring the safetyof the battery.

In some embodiments, the avoidance opening is configured to be capableof providing a deformation space for the pressure relief mechanism, suchthat the pressure relief mechanism deforms and ruptures in a directionclose to the isolation component when the internal pressure andtemperature of the battery cell reaches a threshold value.

Since the avoidance opening can provide the deformation space for thepressure relief mechanism, such that the pressure relief mechanismdeforms and raptures towards a direction that is close to the isolationcomponent when the internal pressure or temperature of the battery cellreaches the threshold, therefore the pressure relief mechanism can beopened smoothly such that the emissions are discharged to the outside.

In some embodiments, each battery cell of the plurality of battery cellsincludes the pressure relief mechanism. Thus, it can be ensured thatwhen the internal pressure or temperature of any one of battery cellsincreases, the internal pressure can be relieved through the pressurerelief mechanism, thereby preventing the battery cell from exploding.

In some embodiments, the avoidance opening is a recess or a throughhole.

By providing the recess or the through hole, the pressure reliefmechanism can be opened smoothly, and thus the batter discharges theemissions to the outside.

In some embodiments, a width of the avoidance opening along a seconddirection is greater than a width of the pressure relief mechanism alongthe second direction, where the second direction is perpendicular to thefirst direction.

By providing the width of the avoidance opening to be greater than thewidth of the pressure relief mechanism, the pressure relief mechanism isprevented from being blocked.

In some embodiments, the avoidance opening is a recess, and a bottomwall of the recess is provided with at least one exhaust hole, and theemissions of the battery cell provided with the pressure reliefmechanism enter the collection chamber through the exhaust hole.

By providing the exhaust hole, the emissions of the battery cellprovided with the pressure relief mechanism can enter the collectionchamber through the exhaust hole, thereby preventing a large amount ofemissions from being blocked by the isolation component and entering theelectrical chamber.

In some embodiments, there are a plurality of the exhaust holes, andeach exhaust hole is arranged opposite to a corresponding pressurerelief mechanism.

By providing the plurality of exhaust holes, and each exhaust hole beingarranged opposite to the corresponding pressure relief mechanism, theemissions can quickly enter the collection chamber through the exhausthole.

In some embodiments, the box includes at least one gas blocking bar, thegas blocking bar is disposed at the bottom wall of the recess, and thegas blocking bar is configured to divide the recess into at least twospaces along the first direction.

By providing the gas blocking bar in the box, the emissions dischargedby the battery cell that the pressure relief mechanism is actuated canbe prevented from impacting the adjacent battery cells, therebypreventing the adjacent battery cells from experiencing a thermallyrunaway, so that the safety performance of the battery is enhanced.

In some embodiments, there are a plurality of the gas blocking bars, andthe plurality of the gas blocking bars are arranged along the firstdirection, such that the gas blocking bar is arranged between the twoadjacent pressure relief mechanisms.

By providing the gas blocking bars between the adjacent pressure reliefmechanisms, the emissions discharged by any one of the actuated batterycells can be prevented from impacting the adjacent battery cells, sothat the safety performance of the battery is further enhanced.

In some embodiments, the gas blocking bar is made of a compressiblematerial, and the gas blocking bar is compressed by the first wall andthe bottom wall of the recess.

Since the gas blocking bar is made of the compressible material, and thegas blocking bar is compressed by the first wall and the bottom wall ofthe recess, thus a good sealing effect can be ensured, thereby betterpreventing the emissions discharged by the battery cell that thepressure relief mechanism is actuated from impacting the adjacentbattery cells.

In some embodiments, notches are provided on two side walls of therecess along the second direction, and the notches are configured toplace the gas blocking bars, and the second direction is perpendicularto the first direction.

The notches are provided on the side walls of the recess of theembodiment of the present application, so the rapid positioning of thegas blocking bars can be achieved, to facilitate the rapid installationand assembly of the battery.

In some embodiments, a blocking member is provided at an outer side ofan opening of the recess along the second direction, and the blockingmember is configured to block an adhesive from entering the recess,where the adhesive is configured to fix the first wall to the isolationcomponent, and the second direction is perpendicular to the firstdirection.

By providing the blocking member at the outer side of the recess, theadhesive can be prevented from entering the recess, avoiding theproblems that the emissions of the pressure relief mechanism cannot besmoothly discharged from the recess caused by the blocking of the recessby the adhesive, thereby enhancing the safety of the battery.

Optionally, the above blocking member may be a rubber blocking strip,and the above adhesive may be a structural glue.

In some embodiments, a second recess is provided at the surface of theisolation component that is close to the battery cell group, and thesecond recess extends along the first direction and is located at theouter side of the opening of the recess along the second direction, andthe second recess is configured to accommodate the blocking member.

By providing the second recess for accommodating the blocking member atthe outer side of the recess, the positioning and fixing of the blockingmember can be achieved.

In some embodiments, the blocking member is made of a compressiblematerial, and the blocking member is compressed by the surface of theisolation component that is close to the battery cell group and a bottomwall of the second recess.

Since the blocking member is made of the compressible material, theblocking member is compressed by the surface of the battery cell groupand the bottom wall of the second recess, so that a good sealing effectcan be ensured, thereby better preventing the adhesive from entering therecess.

In some embodiments, the inside of the isolation component is providedwith a flow channel, and the flow channel is configured to contain afluid such that the isolation component adjusts the temperature for thebattery cell.

By providing the flow channel for containing the fluid inside of theisolation component, the fluid in the flow channel can be used totransfer heat through the heat-conducting material, thereby achievingcooling or heating of the battery cell.

In some embodiments, the isolation component is configured to be capableof being damaged when the pressure relief mechanism is actuated, suchthat the fluid is discharged from inside of the isolation component.

By providing the isolation component to contain the fluid and theisolation component being capable of being damaged when the pressurerelief mechanism is actuated, so that the fluid in the isolationcomponent can be discharged to cool the battery cell, thereby furtherimproving the safety performance of the battery.

In some embodiments, the isolation component includes a first plate anda second plate, the first plate is located at one side of the secondplate that is close to the electrical chamber and attached to the firstwall, a first region of the first plate is recessed towards the secondplate to form the recess, and the first region is connected to thesecond plate.

The isolation component in the embodiment of the present applicationincludes a first plate and a second plate. A flow channel containing afluid can be formed in the isolation component with the first plate andthe second plate, thereby cooling or heating the battery cell.

In some embodiments, the first region is provided with at least onefirst exhaust hole, and the first exhaust hole is disposed opposite tothe pressure relief mechanism

By providing the exhaust hole at the first region opposite to thepressure relief mechanism, the emissions of the pressure reliefmechanism can be smoothly discharged and enter the collection chamber,thereby ensuring the safety of the battery.

In some embodiments, the first region is provided with a plurality ofthe first exhaust holes, and the plurality of first exhaust holes aredisposed at intervals.

By providing the plurality of first exhaust holes disposed at intervals,optionally, the plurality of first exhaust holes can be in one-to-onecorrespondence with the pressure relief mechanisms of the battery cell,in this way, it can be ensured that when the pressure mechanism isactuated, the emissions of each battery cell can smoothly enter thecollection chamber through the exhaust hole, thereby ensuring the safetyof the battery.

In some embodiments, the second plate is provided with a second exhausthole at a position corresponding to the first exhaust hole.

By providing the second exhaust holes corresponding to the first exhaustholes, the emissions of the pressure relief mechanism can be ensured tobe smoothly discharged to the outside of the electrical chamber throughthe first exhaust holes and the second exhaust holes, and enter thecollection chamber, thereby ensuring the safety of the battery.Optionally, the above plurality of the first exhaust holes may be inone-to-one correspondence with the pressure relief mechanisms.

In some embodiments, the first exhaust hole is sealed by a sealing layerand/or the second exhaust hole is sealed by a sealing layer.

By sealing the above first exhaust holes and/or second exhaust holeswith the sealing layer, the sealing of the collection chamber can beachieved, thereby isolating the electrical chamber from the collectionchamber, and preventing the influence of the gas in the collectionchamber on the electrical chamber.

In some embodiments, a thickness of the sealing layer is 0.05 mm-0.3 mm.

In some embodiments, a thickness of a region of the second platecorresponding to the first exhaust hole is less than thicknesses ofother regions of the second plate.

By providing the thickness of the region of the second platecorresponding to the first exhaust hole to be less than the thicknessesof other regions of the second plate, when the pressure relief mechanismis actuated, the region of the second plate corresponding to the firstexhaust hole is more likely to be damaged by the emissions, thereforethe emissions can smoothly enter the collection chamber and the safetyof the battery is ensured.

In some embodiments, a weakened zone is provided at a bottom wall of theavoidance opening, the weakened zone is configured to be capable ofbeing damaged by the emissions discharged from inside of the batterycell when the pressure relief mechanism is actuated, such that theemissions enter the collection chamber through the weakened zone.

By providing the bottom wall of the avoidance opening with the weakenedzone, so that when the pressure relief mechanism is actuated, theemissions can pass through the weakened zone and enter the collectionchamber, thus preventing the emissions from entering the electricalchamber. And it can be also ensured that the electrical chamber isisolated from the collection chamber when the pressure relief mechanismis not actuated, thus preventing water vapor and other substances in thecollection chamber from entering the electrical chamber to cause theshort-circuit hazard.

In some embodiments, a thickness of the weakened zone is less than orequal to 3 mm.

In some embodiments, the weakened zone has a lower melting point thanother regions of the isolation component other than the weakened zone.

The weakened zone in the embodiment of the application has a lowermelting point than other regions of the isolation component other thanthe weakened zone, so that the weakened zone is more likely to bedamaged when impacted by the emissions of the pressure relief mechanism,therefore the emissions can be smoothly discharged to the collectionchamber and the safety of the battery can be ensured.

In some embodiments, a material adopted by the weakened zone has amelting point below 400° C.

In some embodiments, the isolation component is provided with a secondthrough hole, and the emissions are discharged through the secondthrough hole.

By providing the second through hole, the emissions are dischargedthrough the second through hole instead of being discharged to theoutside the battery after entering the collection chamber, which canfurther extend the path of discharging the emissions, reduce the impactof the emissions on the external environment, and ensure the safety ofthe external environment.

In some embodiments, the emissions enter an exhaust channel of theelectrical chamber through the second through hole and is dischargedthrough the exhaust channel.

The emissions in the embodiment of the application enter the exhaustchannel in the electrical chamber through the second through hole andthen are discharged, which can further extend the path of dischargingthe gas and reduce the impact of the emissions on the externalenvironment.

In some embodiments, the isolation component is provided with a wallshared by the electrical chamber and the collection chamber.

Since the isolation component can isolate the emissions from theelectrical chamber, as the wall shared by the electrical chamber and thecollection chamber, therefore the hazard of the emissions is reduced andthe safety of the battery is enhanced.

In some embodiments, the box further includes: a protective member,where the protective member is configured to protect the isolationcomponent, and the collection chamber is formed with the protectivemember and the isolation component.

The collection chamber formed by the protective member and the isolationcomponent can effectively collect and buffer the emissions and reducethe risk resulting therefrom. At the same time, the protective membercan protect the isolation component and prevent the isolation componentfrom being damaged by foreign objects.

In a second aspect, a battery cell group is provided, including: aplurality of battery cells arranged along a first direction, at leasttwo battery cells of the plurality of battery cells include respectivelya pressure relief mechanism, the pressure relief mechanism is configuredto be actuated when internal pressure or a temperature of the batterycell provided with the pressure relief mechanism reaches a thresholdvalue to relieve the internal pressure; and the box according to thefirst aspect.

In a third aspect, a power consumption apparatus is provided, including:the battery according to the second aspect.

In some embodiments, the power consumption apparatus is a vehicle, aship or a spacecraft.

In a fourth aspect, a method for producing a battery is provided,including: providing a battery cell group, where the battery cell groupincludes a plurality of battery cells arranged along a first direction,at least two battery cells of the plurality of battery cells includerespectively a pressure relief mechanism, the pressure relief mechanismis disposed on a first wall of the battery cell, and the pressure reliefmechanism is configured to be actuated when internal pressure or atemperature of the battery cell reaches a threshold value to relieve theinternal pressure; providing a box, where the box includes: anelectrical chamber, configured to accommodate the battery cell group; acollection chamber, configured to collect emissions of the battery cellprovided with the pressure relief mechanism when the pressure reliefmechanism is actuated; an isolation component, configured to isolate theelectrical chamber from the collection chamber, such that the electricalchamber and the collection chamber are arranged at both sides of theisolation component; a surface of the isolation component that is closeto the battery cell group is provided with an avoidance opening, theavoidance opening extends along the first direction, and the pluralityof pressure relief mechanisms of the battery cell group face theavoidance opening.

In a fifth aspect, an apparatus for producing a battery is provided,including a first provision module, configured to provide a battery cellgroup, where the battery cell group includes a plurality of batterycells arranged along a first direction, at least two battery cells ofthe plurality of battery cells include respectively a pressure reliefmechanism, the pressure relief mechanism is disposed on a first wall ofthe battery cell, and the pressure relief mechanism is configured to beactuated when internal pressure or a temperature of the battery cellreaches a threshold value to relieve the internal pressure; a secondprovision module, configured to provide a box, where the box includes:an electrical chamber, configured to accommodate the battery cell group;a collection chamber, configured to collect emissions of the batterycell provided with the pressure relief mechanism when the pressurerelief mechanism is actuated; an isolation component, configured toisolate the electrical chamber from the collection chamber, such thatthe electrical chamber and the collection chamber are arranged at bothsides of the isolation component; and an installation module, configuredto provide an avoidance opening at a surface of the isolation componentthat is close to the battery cell group, where the avoidance openingextends along the first direction, and the plurality of pressure reliefmechanisms of the battery cell group face the avoidance opening.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentapplication more clearly, the following briefly describes theaccompanying drawings required for the embodiments. Apparently, theaccompanying drawings in the following description show merely someembodiments of the present application, and persons of ordinary skill inthe art may still derive other drawings from these accompanying drawingswithout creative efforts.

FIG. 1 is a schematic structural diagram of a vehicle disclosed in anembodiment of present application;

FIG. 2 is a schematic structural diagram of a battery disclosed in anembodiment of the present application;

FIG. 3 is a schematic structural diagram of a battery cell groupdisclosed in an embodiment of the present application;

FIG. 4 is an exploded view of a battery cell disclosed in an embodimentof the present application;

FIG. 5 is an exploded view of a battery cell disclosed in anotherembodiment of the present application;

FIG. 6 is a schematic structural diagram of a battery disclosed in anembodiment of the present application;

FIG. 7 is a schematic cross-sectional view of an avoidance opening beinga through hole in an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of an avoidance opening beinga recess in an embodiment of the present application;

FIG. 9 a is a plan schematic diagram of a battery disclosed in anembodiment of the present application;

FIG. 9 b is a schematic sectional view of the battery shown in FIG. 9 ataken along A-A;

FIG. 9 c is an enlarged view of a part B of the battery shown in FIG. 9b;

FIG. 10 a is a schematic three-dimensional view of an isolationcomponent disclosed in an embodiment of the present application;

FIG. 10 b is an exploded view of an isolation component disclosed in anembodiment of the present application;

FIG. 11 is a schematic diagram of an isolation component provided with agas blocking bar disclosed in an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a gas blocking bardisclosed in an embodiment of the present application;

FIG. 13 is another schematic three-dimensional view of an isolationcomponent disclosed in an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a blocking member disclosedin an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a battery disclosed in anembodiment of the present application;

FIG. 16 is an exploded view of a box disclosed in an embodiment of thepresent application;

FIG. 17 is an exploded view of a box disclosed in an embodiment of thepresent application;

FIG. 18 is a schematic structural diagram of a battery disclosed in anembodiment of the present application;

FIG. 19 is a schematic structural diagram of a box disclosed in anembodiment of the present application;

FIG. 20 is a schematic structural diagram of a box disclosed in anembodiment of the present application;

FIG. 21 is a schematic structural diagram of a battery disclosed in anembodiment of the present application;

FIG. 22 is an exploded view of a battery disclosed in an embodiment ofthe present application;

FIG. 23 is a schematic flowchart of a method for producing a batterydisclosed in an embodiment of the present application; and

FIG. 24 is a schematic block diagram of an apparatus for producing abattery disclosed in an embodiment of the present application.

In the drawings, the drawings are not drawn to actual scale.

DESCRIPTION OF EMBODIMENTS

Implementation manners of the present application will be furtherdescribed below in detail with reference to the accompanying drawingsand embodiments. The detailed description of the following embodimentsand the accompanying drawings are used to exemplarily illustrateprinciples of the present application, but cannot be used to limit thescope of the present application, that is, the present application isnot limited to the described embodiments.

In the description of the present application, it should be noted that,unless otherwise provided, “a plurality of” means more than two(including two); and orientations or positional relationships indicatedby terms such as “up”, “down”, “left”, “right”, “inside”, and “outside”are merely for convenience of describing the present application and forsimplifying the description, rather than for indicating or implying thatan indicated apparatus or element must have a specific orientation, andmust be constructed and operated in a specific orientation, which thusmay not be understood as a limitation the present application. Inaddition, the terms “first”, “second”, and “third” are merely used for apurpose of description, and shall not be understood as an indication orimplication of relative importance. “Vertical” is not strictly vertical,but within an allowable range of error. “Parallel” is not strictlyparallel, but within an allowable range of error.

The orientation words appearing in the following description are alldirections shown in the drawings, and do not limit the specificstructure of the present application. In the description of the presentapplication, it should be further noted that, unless explicitlyspecified and defined otherwise, terms “installation”,“interconnection”, and “connection” should be understood broadly, forexample, they may either be a fixed connection, or a detachableconnection, or an integrated connection; and they may either be a directconnection, or an indirect connection through an intermediary. Those ofordinary skill in the art may understand the specific meanings of theforegoing terms in the present application according to specificconditions.

In the present application, a battery cell may include a primarybattery, a secondary battery, such as a lithium-ion battery, alithium-sulfur battery, a sodium/lithium-ion battery, a sodium-ionbattery or a magnesium-ion battery, which is not limited in theembodiments of the present application. The battery cells may becylindrical, flat, and cuboid or in another shape, which is not limitedby the embodiments of the present application. The battery cells aregenerally divided into three types according to the way of packaging:cylindrical battery cells, prismatic battery cells and pouch batterycells, which are not limited by the embodiments of the presentapplication.

The battery mentioned in the embodiment of the present applicationrefers to a single physical module that includes one or more batterycells to provide a higher voltage and capacity. For example, the batterymentioned in the present application may include a battery cell group ora battery pack. The battery pack generally includes a box forencapsulating one or more battery cells. The box can prevent liquid orother foreign objects from affecting the charging or discharging of thebattery cell.

The battery cell includes an electrode assembly and an electrolyte, andthe electrode assembly includes a positive electrode sheet, a negativeelectrode sheet and a separator. The operation of a battery cell mainlyrelies on movement of metal ions between the positive electrode sheetand the negative electrode sheet. The positive electrode sheet includesa positive electrode current collector and a positive electrode activematerial layer. The positive electrode active material layer is coatedon a surface of the positive electrode current collector, and thecurrent collector not coated with the positive electrode active materiallayer protrudes from the current collector coated with the positiveelectrode active material layer and serves as a positive tab. In anexample of a lithium-ion battery, the material of the positive electrodecurrent collector may be aluminum, and the positive electrode activematerial may be lithium cobalt oxides, lithium iron phosphate, ternarylithium, lithium manganate, or the like. The negative electrode sheetincludes a negative electrode current collector and a negative electrodeactive material layer. The negative electrode active material layer iscoated on a surface of the negative electrode current collector, and thecurrent collector not coated with the negative electrode active materiallayer protrudes from the current collector coated with the negativeelectrode active material layer and serves as a negative tab. A materialof the negative electrode current collector may be copper, and thenegative electrode active material may be carbon, silicon, or the like.In order to ensure that no fusing occurs when a large current passes,there are a plurality of positive electrode tabs which are stackedtogether, and there are a plurality of negative electrode tabs which arestacked together. A material of the separator may be PP, PE, or thelike. In addition, the electrode assembly may be a coiled structure or alaminated structure, and the embodiments of the present application arenot limited thereto. With the development of the battery technology, itis necessary to consider many design factors, such as energy density,cycle life, discharge capacity, C-rate and other performance parameters.In addition, the safety of the battery should also be considered. For abattery, a main safety hazard comes from the charging and dischargingprocess, and in order to improve safety performance of the battery, abattery cell is generally provided with a pressure relief mechanism. Thepressure relief mechanism refers to an element or component that isactuated when an internal pressure or temperature of the battery cellreaches a predetermined threshold, to relieve the internal pressure ortemperature. The predetermined threshold may be adjusted according todifferent design requirements. The predetermined threshold may depend onthe material of one or more of the positive electrode sheet, thenegative electrode sheet, the electrolyte and the separator in thebattery cell. The pressure relief mechanism may adopt, for example, apressure-sensitive or temperature-sensitive element or component. Thatis, when the internal pressure or temperature of the battery cellreaches a predetermined threshold, the pressure relief mechanism isactuated, so as to form a channel for relieving the internal pressure ortemperature.

The “actuation” mentioned in the present application means that thepressure relief mechanism acts, so that the internal pressure andtemperature of the battery cell can be relieved. The action generated bythe pressure relief mechanism may include but be not limited to: atleast a portion of the pressure relief mechanism being fractured, tornor melted, and so on. After the pressure relief mechanism is actuated,high-temperature and high-pressure substances inside the battery cellare discharged outwards from the pressure relief mechanism as emissions.In this way, the pressure of the battery cell can be relieved at acontrollable pressure or temperature, thereby avoiding potentially moreserious accidents.

The emissions of the battery cell mentioned in the present applicationinclude but are not limited to: an electrolyte, dissolved or splitpositive and negative electrode sheets, fragments of a separator,high-temperature and high-pressure gas generated by reaction, flame, orthe like.

The pressure relief mechanism on the battery cell has an importantimpact on the safety of the battery. For example, when short circuit,overcharge and other phenomena occur in the battery cell, it may lead tothermal runaway inside the battery cell, resulting in a sudden increasein pressure or temperature. In this case, the internal pressure andtemperature can be released outward through the actuation of thepressure relief mechanism, to prevent the battery cell from explodingand catching fire.

In the current design solutions of the pressure relief mechanism, themain concern is to release the high pressure and high heat inside thebattery cell, i.e., to discharge the emissions to the outside of thebattery cell. In order to ensure an output voltage or current of thebattery, the plurality of battery cells are often required to beelectrically connected to each other via a bus component. The emissionsdischarged from the inside of the battery cell experiencing thermalrunaway may cause short circuit of the other battery cells. For example,when discharged metal scraps are electrically connected to two buscomponents, part of the battery cells will be short-circuited, therebyposing a potential safety hazard.

In view of this, the embodiment of the present application is providedwith a technical solution, the isolation component is used to separatethe electrical chamber for accommodating the battery cell and thecollection chamber for collecting the emissions. When the pressurerelief mechanism is actuated, the emissions of the battery cell enterthe collection chamber instead of the electrical chamber, or a smallamount of the emissions enter the electrical chamber, so that theelectrical connection component in the electrical chamber is notconductive and short-circuited, and therefore the safety of the batterycan be enhanced. By providing the avoidance opening corresponding to thepressure relief mechanism of the battery cell group in the box of thebattery, the pressure relief mechanism is prevented from being blocked,and the pressure relief mechanism is ensured to be able to smoothlydischarge the emissions. At the same time, compared with the solutionthat each pressure relief mechanism is in one-to-one correspondence witheach avoidance opening (this solution has extremely high requirements toassembly, if a cumulative tolerance of the assembly exceeds an allowablerange, the pressure relief mechanism of some battery cells will not bealigned with the corresponding avoidance opening, thereby being blockedby the isolation component, therefore the emissions are not dischargedsmoothly when the pressure relief mechanism is actuated, and in extremecases, the battery cell will explode because the pressure is notrelieved in time). By providing the avoidance opening extending alongthe first direction, and making all of the plurality of pressure reliefmechanisms of the battery cell group face the avoidance openings, thedifficulty of aligning the pressure relief mechanism with the avoidanceopening can be greatly reduced, thereby preventing the pressure reliefmechanism from being blocked.

The isolation component is configured to isolate the electrical chamberfrom the collection chamber, such that the electrical chamber and thecollection chamber are arranged on both sides of the isolationcomponent. Optionally, the isolation component in the embodiment of thepresent application can also be used as a thermal management component,that is, the isolation component can contain a fluid to adjust thetemperature of the plurality of battery cells. The fluid here may beliquid or gas, and the temperature adjustment means heating or coolingthe plurality of battery cells. In the case of cooling or lowering thetemperature of the battery cells, the isolation component is configuredto contain the cooling fluid to lower the temperature of the pluralityof battery cells. In addition, the isolation component can also beconfigured to heat so as to raise the temperature of the plurality ofbattery cells, the embodiment of the present application is not limitedthereto. Optionally, the fluid may flow in a circulating manner toachieve a better temperature adjustment effect. Optionally, the fluidmay be water, a mixture of water and ethylene glycol, air, or the like.

The electrical chamber mentioned in the present application isconfigured to accommodate a plurality of battery cells and a buscomponent. The electrical chamber may be sealed or unsealed. Theelectrical chamber provides an installation space for the battery cellsand the bus component. In some embodiments, a structure configured tofix the battery cells may also be disposed in the electrical chamber.The shape of the electrical chamber may be determined according to thenumber and shape of the battery cells and the bus component which areaccommodated therein. In some embodiments, the electrical chamber may bea cube with six walls. The bus component mentioned in the presentapplication is configured to implement the electric connection among theplurality of battery cells, such as parallel connection, seriesconnection or series-parallel connection. The bus component mayimplement the electrical connection among the battery cells byconnecting electrode terminals of the battery cells. In someembodiments, the bus component may be fixed to the electrode terminalsof the battery cells by means of welding.

The collection chamber mentioned in the present application isconfigured to collect the emissions, and may be sealed or unsealed. Insome embodiments, the collection chamber may contain air or other gases.Optionally, the collection chamber may also contain a liquid, such as acooling medium, or provide a component for accommodating the liquid tofurther lower the temperature of the emissions entering the collectionchamber. Further, optionally, the gas or liquid in the collectionchamber flows in a circulating manner.

The technical solutions described in the embodiments of the presentapplication are all applicable to various apparatuses using batteries,such as mobile phones, portable apparatus, notebook computers, electromobiles, electronic toys, electric tools, electric vehicles, ships andspacecrafts. For example, the spacecrafts include airplanes, rockets,space shuttles and spaceships, and the like.

It should be understood that the technical solutions described in theembodiments of the present application are not only applicable to theapparatus described above, but also applicable to all apparatus usingbatteries. However, for brief description, the following embodiments areall described by an example of an electric vehicle.

For example, as shown in FIG. 1 , FIG. 1 is a schematic structuraldiagram of a vehicle 1 according to an embodiment of the presentapplication. The vehicle 1 may be a fuel-powered vehicle, a gas-poweredvehicle or a new energy vehicle, and the new energy vehicle may be abattery electric vehicle, a hybrid vehicle, an extended-range vehicle,or the like. The vehicle 1 may be internally provided with a motor 40, acontroller 30 and a battery 10, and the controller 30 is configured tocontrol the battery 10 to supply power to the motor 40. For example, thebattery 10 may be disposed at the bottom, head or tail of the vehicle 1.The battery 10 may be used for power supply power to the vehicle 1. Forexample, the battery 10 may serve as an operation power source of thevehicle 1 for a circuit system of the vehicle 1, for example, for aworking power demand of the vehicle 1 during startup, navigation andrunning. In another embodiment of the present application, the battery10 may serve not only as an operation power source of the vehicle 1, butalso as a driving power source of the vehicle 1, replacing or partiallyreplacing fuel or natural gas to provide driving power for the vehicle1.

In order to meet different power demands, the battery of the presentapplication may be a battery cell group or a battery pack. The batterymay include at least one battery cell group. The battery cell groupincludes a plurality of battery cells, where the plurality of batterycells may be electrically connected in series connection, parallelconnection or series-parallel connection to form a battery, where theseries-parallel connection refers to a combination of series connectionand parallel connection. The battery may also be a battery pack. Theplurality of battery cells may firstly be connected in series or inparallel or in series and parallel to form a battery cell group, andthen the plurality of battery cell groups are connected in series or inparallel or in series and parallel to form a battery pack.

For example, as shown in FIG. 2 , FIG. 2 is a schematic structuraldiagram of a battery 10 according to an embodiment of the presentapplication. The battery 10 may include at least one battery cell group200. The battery cell group 200 includes a plurality of battery cells20. The battery 10 may further include a box, inside of the box is ahollow structure, and the plurality of battery cells 20 are accommodatedin the box. As shown in FIG. 2 , the box may include two portions, whichare referred to as a first portion 111 and a second portion 112,respectively, and the first portion 111 and the second portion 112 arefastened together. The shapes of the first portion 111 and the secondportion 112 may be determined according to the shape of the combinedbattery cell groups 200. The first portion 111 and the second portion112 each may be provided with an opening. For example, the first portion111 and the second portion 112 each may be a hollow cuboid and each isprovided with only one surface with an opening, and the opening of thefirst portion 111 is arranged opposite to the opening of the secondportion 112. The first portion 111 and the second portion 112 arefastened to each other to form a box with a closed chamber. Theplurality of battery cells 20 are combined in parallel connection orseries connection or series-parallel connection and are then placed inthe box formed by fastening the first portion 111 to the second portion112.

Optionally, the battery 10 may also include other structures, which willnot be described in detail herein. For example, the battery 10 may alsoinclude a bus component. The bus component is configured to implementelectric connection among the plurality of battery cells 20, such asparallel connection, series connection or series-parallel connection.Specifically, the bus component may implement the electrical connectionamong the battery cells 20 by connecting electrode terminals of thebattery cells 20. Further, the bus component may be fixed to theelectrode terminals of the battery cells 20 by means of welding.Electric energy of the plurality of battery cells 20 can be further ledout through an electrically conductive mechanism to pass through thebox.

According to different power demands, the number of battery cells 20 inthe battery cell group 200 may be set to any value. The plurality ofbattery cells 20 can be connected in series, in parallel or in seriesand parallel to achieve larger capacity or power. Since there may bemany battery cells 20 included in each battery 10, the battery cells 20are arranged in groups for convenience of installation, and each groupof battery cells 20 constitutes a battery cell group 200. The number ofthe battery cell group 200 included in the battery module 200 is notlimited and may be set according to demands. For example, FIG. 3 is anexample of the battery cell group 200. The battery may include aplurality of battery cell groups, and these battery cell groups may beconnected in series, in parallel or in series and parallel.

As shown in FIG. 4 , FIG. 4 is a schematic structural diagram of abattery cell 20 according to an embodiment of the present application.The battery cell 20 includes one or more electrode assemblies 22, ahousing 211 and a cover plate 212. A shell 21 is formed with the housing211 and the cover plate 212. A wall of the housing 211 and the coverplate 212 are each referred to as a wall of the battery cell 20. Thehousing 211 is shaped according to a shape of the one or more electrodeassemblies 22 after combination. For example, the housing 211 may be ahollow cuboid or cube or cylinder, and one surface of the housing 211 isprovided with an opening, so that the one or more electrode assemblies22 may be placed in the housing 211. For example, when the housing 211is a hollow cuboid or cube, one plane of the housing 211 is an openingsurface, that is, the plane does not have a wall, so that the inside andoutside of the housing 211 are in communication with each other. Whenthe housing 211 is a hollow cylinder, an end face of the housing 211 isan opening face, that is, the end face does not have a wall, so that theinside and outside of the housing 211 are in communication with eachother. The cover plate 212 covers the opening and is connected to thehousing 211 to form a closed cavity in which the electrode assembly 22is placed. The housing 211 is filled with an electrolyte, such as anelectrolytic solution.

The battery cell 20 may further include two electrode terminals 214, andthe two electrode terminals 214 may be disposed on the cover plate 212.The cover plate 212 is generally in a shape of a flat plate, and the twoelectrode terminals 214 are fixed on a flat plate face of the coverplate 212. The two electrode terminals 214 are a positive electrodeterminal 214 a and a negative electrode terminal 214 b, respectively.Each of electrode terminals 214 is correspondingly provided with aconnecting member 23, which is disposed between the cover plate 212 andthe electrode assembly 22. The connecting member 23 is configured toachieve the electrical connection between the electrode assembly 22 andthe electrode terminal 214.

As shown in FIG. 4 , each of the electrode assembles 22 is provided witha first electrode tab 221 a and a second electrode tab 222 a. The firstelectrode tab 221 a and the second electrode tab 222 a have oppositepolarities. For example, when the first electrode tab 221 a is apositive electrode tab, the second electrode tab 222 a is a negativeelectrode tab. The first electrode tab 221 a of the one or moreelectrode assemblies 22 is connected to one electrode terminal throughone connecting member 23, and the second electrode tab 222 a of the oneor more electrode assemblies 22 is connected to the other electrodeterminal through the other connecting member 23. For example, thepositive electrode terminal 214 a is connected to the positive electrodetab through one connecting member 23, and the negative electrodeterminal 214 b is connected to the negative electrode tab through theother connecting member 23.

In the battery cell 20, according to actual use demands, there may be asingle electrode assembly 22 or a plurality of electrode assemblies 22.As shown in FIG. 4 , four separate electrode assemblies 22 are disposedin the battery cell 20.

As shown in FIG. 5 , FIG. 5 is a schematic structural diagram of abattery cell 20 provided with a pressure relief mechanism 213 accordingto another embodiment of the present application.

The housing 211, the cover plate 212, the electrode assembly 22 and theconnecting member 23 in FIG. 5 are consistent with the housing 211, thecover plate 212, the electrode assembly 22 and the connecting member 23in FIG. 4 , which will not be repeated here for brevity.

One wall of the battery cell 20, such as a first wall 21 a shown in FIG.5 , may be further provided with a pressure relief mechanism 213. InFIG. 5 , the first wall 21 a is separated from the housing 211, that is,a bottom side of the housing 211 is provided with an opening, the firstwall 21 a covers the opening on the bottom side and is connected to thehousing 211, and the connection manner may be welding or connecting withan adhesive. Alternatively, the first wall 21 a and the housing 211 mayalso be a one-body structure. The pressure relief mechanism 213 isconfigured to be actuated when the internal pressure or temperature ofthe battery cell 20 reaches a threshold, to relieve the internalpressure or temperature.

The pressure relief mechanism 213 may be a part of the first wall 21 a,or may be a separate structure from the first wall 21 a, and fixed tothe first wall 21 a by means of welding, for example. When the pressurerelief mechanism 213 is a part of the first wall 21 a, for example, thepressure relief mechanism 213 can be formed by providing an indentationon the first wall 21 a, and a thickness of the first wall 21 acorresponding to the indentation is less than that of other regions ofthe pressure relief mechanism 213 other than the indentation. Theindentation is the weakest position of the pressure relief mechanism213. When excessive gas generated by the battery cell 20 causes aninternal pressure of the housing 211 to rise and reach a threshold, orheat generated by the internal reaction of the battery cell 20 causes aninternal temperature of the battery cell 20 to rise and reach athreshold, the pressure relief mechanism 213 may be fractured at theindentation, resulting in the communication between the inside andoutside of the housing 211. The gas pressure and temperature arereleased outward through the cracking of the pressure relief mechanism213, thereby preventing the battery cell 20 from exploding.

Optionally, in an embodiment of the present application, as shown inFIG. 5 , in a case where the pressure relief mechanism 213 is disposedon the first wall 21 a of the battery cell 20, a second wall of thebattery cell 20 is provided with electrode terminals 214, and the secondwall is different from the first wall 21 a.

Optionally, the second wall is arranged opposite to the first wall 21 a.For example, the first wall 21 a may be a bottom wall of the batterycell 20, and the second wall may be the cover plate 212 of the batterycell 20.

Optionally, as shown in FIG. 5 , the battery cell 20 may further includea backing plate 24. The backing plate 24 is located between theelectrode assembly 22 and a bottom wall of the housing 211, may play arole of supporting the electrode assembly 22, and may also effectivelyprevent the electrode assembly 22 from interfering with rounded cornersof a periphery of the bottom wall of the housing 211. In addition, oneor more through holes may be disposed on the backing plate 24. Forexample, a plurality of through holes uniformly arranged may beprovided, or when the pressure relief mechanism 213 is disposed on thebottom wall of the housing 211, a through hole is disposed at a positioncorresponding to the pressure relief mechanism 213, so as to facilitateconduction of an electrolytic solution or gas. Specifically, this cancommunicate spaces of an upper surface and a lower surface of thebacking plate 24, and gas generated inside the battery cell 20 and theelectrolytic solution can freely pass through the backing plate 24.

The pressure relief mechanism 213 and the electrode terminals 214 aredisposed on different walls of the battery cell 20, so that when thepressure relief mechanism 213 is actuated, the emissions of the batterycell 20 may be farther away from the electrode terminals 214, therebyreducing the impact of the emissions on the electrode terminals 214 andthe bus component and therefore the safety of the battery can beenhanced.

Further, when the electrode terminals 214 are disposed on the coverplate 212 of the battery cell 20, the pressure relief mechanism 213 isdisposed on a bottom wall of the battery cell 20, so that when thepressure relief mechanism 213 is actuated, the emissions of the batterycell 20 may be are discharged to a bottom of the battery 10. In thisway, on one hand, a risk of the emissions may be reduced by using anisolation component at the bottom of the battery 10, and on the otherhand, the bottom of the battery 10 is usually away from a user, therebyreducing harm to the user.

The pressure relief mechanism 213 may be in various possible pressurerelief structures, which is not limited in the embodiments of thepresent application. For example, the pressure relief mechanism 213 maybe a temperature-sensitive pressure relief mechanism, thetemperature-sensitive pressure relief mechanism is configured to becapable of being melted when the internal temperature of the batterycell 20 provided with the pressure relief mechanism 213 reaches athreshold; and/or the pressure relief mechanism 213 may be apressure-sensitive pressure relief mechanism, and the pressure-sensitivepressure relief mechanism is configured to be capable of being fracturedwhen the internal gas pressure of the battery cell 20 provided with thepressure relief mechanism 213 reaches a threshold.

In some design solutions of the pressure relief mechanism of currentbatteries, there are still existing problems, such as the emissionscannot be discharged because of some blocked pressure relief mechanisms,complicated design solutions, installation difficulties, and the like.Embodiments of the present application is provided with the box of thebattery, the isolation component is used to separate the electricalchamber for accommodating the battery cell and the collection chamberfor collecting the emissions. When the pressure relief mechanism isactuated, the emissions of the battery cell enter the collection chamberinstead of the electrical chamber, or a small amount of the emissionsenter the electrical chamber, so that the electrical connectioncomponent in the electrical chamber is not conductive andshort-circuited, and therefore the safety of the battery can beenhanced. By providing the avoidance opening corresponding to thepressure relief mechanism of the battery cell group in the box of thebattery, the pressure relief mechanism is prevented from being blocked,and the pressure relief mechanism is ensured to be able to smoothlydischarge the emissions. At the same time, compared with the solutionthat each pressure relief mechanism is in one-to-one correspondence witheach avoidance opening (this solution has extremely high requirements toassembly, if a cumulative tolerance of the assembly exceeds an allowablerange, the pressure relief mechanism of some battery cells will not bealigned with the corresponding avoidance opening, thereby being blockedby the isolation component, therefore the emissions are not dischargedsmoothly when the pressure relief mechanism is actuated, and in extremecases, the battery cell will explode because the pressure is notrelieved in time). By providing the avoidance opening extending alongthe first direction, and making all of the plurality of pressure reliefmechanisms of the battery cell group face the avoidance openings, thedifficulty of aligning the pressure relief mechanism with the avoidanceopening can be greatly reduced, thereby preventing the pressure reliefmechanism from being blocked.

FIG. 6 is a schematic structural diagram of a battery in an embodimentof the present application. As shown in FIG. 6 , the box 11 may includean electrical chamber 11 a, a collection chamber 11 b, and an isolationcomponent 13. The isolation component 13 is configured to isolate theelectrical chamber 11 a from the collection chamber 11 b. The so-called“isolation” here refers to separation, which may or may not be sealed.

The electrical chamber 11 a is configured to accommodate the batterycell group 200, where the battery cell group 200 includes the pluralityof battery cells 20 arranged along the first direction. Optionally, thefirst direction may be orientation of a single row or single column. Thebattery cell group 200 is provided with an accommodating space by theelectrical chamber 11 a, and a shape of the electrical chamber 11 a maybe determined according to the battery cell group 200.

Optionally, the electrical chamber 11 a may also be configured toaccommodate a bus component 12. The bus component 12 is configured toimplement electrical connection among the plurality of battery cells 20.The electrical connection among the plurality of battery cells 20 may beimplemented by the bus component 12 connecting electrode terminals 214of the battery cells 20.

At least two battery cells 20 of the plurality of battery cells mayinclude a pressure relief mechanism 213. The pressure relief mechanism213 is disposed on a first wall 21 a of the battery cell 20. Thepressure relief mechanism 213 is configured to be actuated when theinternal pressure or temperature of the battery cell 20 reaches athreshold value to relieve the internal pressure

For convenience of description, the battery cell 20 involved in thefollowing description about the pressure relief mechanism 213 refers tothe battery cell 20 provided with the pressure relief mechanism 213. Forexample, the battery cell 20 may be the battery cell 20 in FIG. 5 .

The collection chamber 11 b is configured to collect the emissions ofthe battery cell 20 provided with the pressure relief mechanism 213 whenthe pressure relief mechanism 213 is actuated.

The isolation component 13 is configured to isolate the electricalchamber 11 a from the collection chamber 11 b, such that the electricalchamber 11 a and the collection chamber 11 b are arranged on both sidesof the isolation component 13.

In the embodiment of the present application, the isolation component 13is adopted to isolate the electrical chamber 11 a from the collectionchamber 11 b. That is, the electrical chamber 11 a for accommodating thebattery cell group 200 is separated from the collection chamber 11 b. Inthis way, when the pressure relief mechanism 213 is actuated, theemissions of the battery cell 20 enter the collection chamber 11 binstead of the electrical chamber 11 a, or a small amount of emissionsenter the electrical chamber 11 a, so that the electrical connection inthe electrical chamber 11 a is not affected, and therefore the safety ofthe battery can be enhanced.

Optionally, the inside of the isolation component 13 is provided with aflow channel, and the flow channel is configured to contain a fluid suchthat the isolation component 13 adjusts the temperature for the batterycell 20. Specifically, the isolation component 13 may include a flowchannel made of a thermally conductive material. The fluid flows in theflow channel, and transfer heat through the heat-conducting material,thereby cooling or heating the battery cell 20. Optionally, the fluidmay flow in a circulating manner to achieve a better temperatureadjustment effect.

Optionally, the isolation component 13 of the embodiment of the presentapplication is configured to be capable of being damaged when thepressure relief mechanism 213 is actuated, such that the fluid isdischarged from the inside of the isolation component 213. Specifically,when the pressure relief mechanism 213 is actuated, the isolationcomponent 13 is damaged, and the fluid is discharged from the inside ofthe isolation component 13. Thus, the heat of the battery cell 20 can beabsorbed and the temperature of the emissions is reduced, thus the riskresulting from the emissions is reduced. In this case, the fluid entersthe collection chamber 11 b together with the emissions cooled by thefluid. Thanks to the cooling by the fluid, the temperature of theemissions of the battery cell 20 can be quickly reduced, and thus therisk of the emissions entering the collection chamber 11 b is greatlyreduced. The emissions do not have a great impact on other parts of thebattery (such as other battery cells 20), so that the destructivenesscaused by the abnormality of a single battery cell 20 can be suppressedas soon as possible, and the possibility of battery explosion can bereduced.

It should be understood that, in addition to providing the isolationcomponent 13 with a structure that the isolation component 13 can bedamaged when the pressure relief mechanism 213 is actuated, the pressurerelief mechanism 213 may be also provided with a damage apparatus, andthe damage apparatus is configured to damage the isolation component 13when the pressure relief mechanism 213 is actuated, such that the fluidis discharged from the inside of the isolation component 13. Forexample, the breaking apparatus may be a spike, but the embodiment ofthe present application is not limited thereto.

In order to ensure that the pressure relief mechanism can be openedsmoothly such that the battery cell can discharge the emissions. Asurface of the isolation component 13 of the present application that isclose to the battery cell group 200 can be provided with an avoidanceopening. The avoidance opening extends along the first direction wherearranging the plurality of battery cells 20. And all of the pressurerelief mechanisms corresponding to the plurality of battery cells 20 inthe battery cell group 200 face the avoidance opening, that is, theavoidance opening may cover all of the pressure relief mechanisms of thebattery cell group 200.

The avoidance opening of the embodiment of the present application maybe configured to provide a deformation space for the pressure reliefmechanism 213, such that the pressure relief mechanism 213 deforms andruptures in a direction close to the isolation component 13 when theinternal pressure and temperature of the battery cell reaches athreshold value.

The pressure relief mechanism 213 is provided with the deformation spaceby the avoidance opening, so the pressure relief mechanism 213 of theembodiment of the present application may rapture in the deformationspace when the internal pressure or temperature of the battery cell 20reaches the threshold, which prevent the pressure relief mechanism 213from being block, thereby ensuring the discharge of its emissions, andthus, the safety of the battery is enhanced. At the same time, theavoidance opening of the embodiment of the present application may coverall of the pressure relief mechanisms 213 of the battery cell group 200.Compared with the solution that each pressure relief mechanism is inone-to-one correspondence with each avoidance opening, the avoidanceopening extends along the first direction, so all of the pressure reliefmechanisms 213 in the battery cell group face the avoidance opening, andthus the difficulty of aligning the pressure relief mechanism with theavoidance opening can be greatly reduced, thereby preventing thepressure relief mechanism from being blocked.

Optionally, the avoiding opening in the embodiment of the presentapplication may be a recess or a through hole, and the recess or thethrough hole can provide a deformation space for the pressure reliefmechanism 213, such that the pressure relief mechanism 213 can rapturesmoothly and discharge the emissions when it is actuated.

As an embodiment, a width of the avoidance opening of the embodiment ofthe present application along a second direction is associated with awidth of the pressure relief mechanism 213 along the second direction.Specifically, the width of the avoidance opening along the seconddirection is greater than the width of the pressure relief mechanism 213along the second direction, where the second direction is perpendicularto the first direction.

The following describes the cases where the avoidance opening in theembodiments of the present application are configured as a recess or athrough hole.

FIG. 7 shows a schematic cross-sectional view of an avoidance openingdisposed on the isolation component 13 being a through hole in anembodiment of the present application. As shown in FIG. 7 , on theisolation component 13 is provided with a though hole 137. On the onehand, the through hole 137 may be the avoidance opening, on the otherhand, the emissions of the battery cell 20 provided with the pressurerelief mechanism 213 can enter the collection chamber 11 b though thethrough hole 137 when the pressure relief mechanism 213 is actuated.

As an embodiment, the through hole 137 may be arranged opposite to thepressure relief mechanism 213. In this way, when the pressure reliefmechanism 213 is actuated, the emissions may directly enter thecollection chamber 11 b through the through hole 137.

Optionally, the isolation component 13 is only provided with one throughhole 137, and the one through hole 137 corresponds to all of thepressure relief mechanisms of the battery cell group 200. By providingthe through hole 137 corresponding to the pressure relief mechanism 213,a deformation space can be provided for the pressure relief mechanism213, so that when the pressure relief mechanism 213 is actuated, theemissions can be discharged into the collection chamber 11 b through thethrough hole 137. It is mentioned above that the inside of the isolationcomponent 13 can contain a fluid, and, the isolation component 13 can bedamaged when the pressure relief mechanism 213 is actuated, such thatthe fluid is discharged from the inside of the isolation component 13.Corresponding to the situation that the isolation component 13 may bedamaged, in an embodiment of the application, when the avoidance openingof the isolation component 13 is configured to be a through hole 137, apart around the isolation component 13 can be damaged by the emissionsof the battery cell 20 provided with the pressure relief mechanism 213,such that the fluid is discharged from the inside of the isolationcomponent 13.

Specifically, when the pressure relief mechanism 213 is actuated, theemissions of the battery cell 20 enter the collection chamber 11 bthrough the through hole 137. In addition, the emissions also damage theparts around the through hole 137. For example, the hot emissions meltthe isolation component 13 around the through hole 137, so that thefluid is discharged from the inside of the isolation component 13,thereby cooling the hot emissions.

Optionally, in an embodiment of the present application, a hole wall ofthe through hole 137 can be damaged by the emissions of the battery cell20 provided with the pressure relief mechanism 213, such that the fluidis discharged from the inside of the isolation component 13.

When the pressure relief mechanism 213 is actuated, the emissions of thebattery cell 20 rush into the through hole 137, Since the emissions havehigh pressure and high heat, the emissions further melt the hole wall ofthe through hole 137 when passing through the through hole 137, so thatthe fluid is discharged from the inside of the isolation component 13,thereby cooling the emissions.

Optionally, the hole wall of the through hole 137 is inclined in theaxial direction. Specifically, the diameter of the through hole 137gradually becomes smaller along the discharging direction of theemissions, so that the contact area with the discharge can be increased,which is more convenient. The hole wall of the through hole 137 isdamaged by the emissions.

Optionally, the through hole 134 a is configured to meet the conditionthat the pressure relief mechanism 213 can be opened when actuated. Asan embodiment of the present application, the area of an opening of thethrough hole 137 is associated with the area of the pressure reliefmechanism 213. In order that the pressure relief mechanism 213 can beopened, a ratio of the area of the opening of the through hole 137 tothe area of the pressure relief mechanism 213 needs to be greater than acertain value. In addition, in order to facilitate the damage to theside wall of the through hole 137 by the emissions, the ratio of thearea of the opening of the through hole 137 to the area of the pressurerelief mechanism 213 also needs to be less than a certain value.

FIG. 8 shows a schematic cross-sectional view where the avoidanceopening provided by the isolation component 13 being a recess in anembodiment of the present application. As shown in FIG. 8 , theisolation member 13 is provided with a recess 134 which is arrangedopposite to the pressure relief mechanism 213.

Optionally, a depth of the recess 134 may be greater than or equal to 2mm, so as to provide sufficient deformation space for the pressurerelief mechanism and facilitate the actuation of the pressure reliefmechanism.

As an embodiment, the bottom wall of the recess 134 can be provided withat least one exhaust hole, the emissions of the battery cell 20 providedwith the pressure relief mechanism 213 can enter the collection chamber11 b through the above exhaust hole.

Optionally, there are a plurality of the above configured exhaust holes,and each exhaust hole is arranged opposite to a corresponding pressurerelief mechanism 213.

The bottom wall of the recess 134 is provided with the exhaust hole, sothat the emissions, discharged by the pressure relief mechanism 213 whenit is actuated, is discharged to the collection chamber 11 b, preventingor reducing the emissions form entering the electrical chamber 11 a,thereby improving the safety performance of the battery.

The isolation component 13 of the embodiment of the present applicationdescribed above can contain the fluid, and the isolation component 13being able to contain the embodiment of the present application willdescribed below. As an embodiment, the isolation component 13 of theembodiment of the present application may include a first plate and asecond plate. As shown in FIGS. 9 a to 9 c , where FIG. 9 a is a planschematic diagram of a battery in an embodiment of the presentapplication, FIG. 9 b is sectional view of the box along A-A′ of anembodiment of the present application, and FIG. 9 c is an partiallydetailed view corresponding to FIG. 9B.

Optionally, the first plate and the second plate in the embodiment ofthe present application may be thermally conductive plates.Specifically, the material of the first plate and the second plate ismetal, for example, aluminum or steel.

As shown in FIG. 9 c , a flow channel 133 can formed with the firstplate 131 and the second plate 132, configured to contain the fluid. Thefirst plate 131 is disposed on one side of the second plate 132 that isclose to the electrical chamber 11 b, and attached to the first wall 21a. A first region 131 a of the first plate 131 is recessed toward thesecond plate 132 to form a recess 134, and the first region 131 a isconnected to the plate 132. In this way, a flow channel 133 is formedaround the recess 134, and there is no flow channel in the bottom wallof the recess 134, so as to be damaged by the emissions of the pressurerelief mechanism.

As described above, when the avoidance opening of the isolationcomponent 13 is the recess 134, at least one exhaust hole may beprovided on the bottom wall of the recess 134. In the case that theisolation component 13 in the embodiment of the present application isprovided with a first plate 131 and a second plate 131, as shown in FIG.9 c , a cross-sectional view of the first exhaust hole 1311 provided onthe first plate 131 and the second exhaust hole 1321 provided on thesecond plate 132 is shown. Optionally, the first exhaust hole 1311 andthe second exhaust hole 1321 may be configured to the same size.

It should be understood that the first exhaust hole 1311 and the secondexhaust hole 1321 may jointly constitute the exhaust hole provided onthe recess 134 described above.

The following is a specific embodiment in which an exhaust hole isprovided on the bottom wall of the recess 134 of the isolation member13.

FIG. 10 a to FIG. 10 b show a schematic structural diagram of anisolation component 13 of an embodiment of the present application. Asshown in FIG. 10 a , the first plate 131 is recessed to form a recess134 that extends along the first direction and may correspond to thepressure relief mechanisms 213 of the battery cells 20 of the batterycell group 200. Optionally, the recess 134 may correspond to thepressure relief mechanism 213 of all the battery cells 20 of the batterycell group 200.

As described above, when the isolation member 13 includes the firstplate 131 and the second plate 132, corresponding to FIG. 9 c , a firstexhaust hole 1311 may be provided to the first area 131 a of the firstplate 131, as shown in FIG. 10 a . There may be one first exhaust hole1311. For example, the first region 131 a may be provided with only onefirst exhaust hole 1311 extending along the first direction. In thiscase, the first exhaust hole 1311 may correspond to a battery cellgroup. All of the pressure relief mechanisms 213 of the battery cellgroup 200, or, a plurality of first exhaust holes 1311 may be providedon the first region 131 a, and the plurality of first exhaust holes 1311are arranged at intervals in the first direction. For example, thenumber of the provided first exhaust holes 1311 may be the same as thenumber of the pressure relief mechanism 213 of the battery cell group200. In this way, each first exhaust 1311 can be in one-to-onecorrespondence with the corresponding pressure relief mechanism 213,thereby ensuring that the emissions can be smoothly discharged from thepressure relief mechanism 213. FIG. 10 a only shows the one-to-onecorrespondence among the plurality first exhaust holes 1311 and thepressure relief mechanisms 213, but the embodiment of the presentapplication is not limited thereto.

Optionally, as an implementation manner, the position that the secondplate 132 corresponding to the first exhaust hole 1311 may be providedwith a second exhaust hole 1321. The first exhaust hole 1311 and thesecond exhaust hole 1321 may be configured to be the same.

The bottom wall of the recess 134 is provided with exhaust hole, suchthat the emissions can be smoothly discharged when the pressure reliefmechanism 213 is actuated.

As an embodiment, in order to ensure the isolation between theelectrical chamber 11 a and the collection chamber 11 b, the firstexhaust hole 1311 may be sealed by the sealing layer and/or the secondexhaust hole 1321 may be sealed by the sealing layer, and the athickness of the sealing layer may be 0.05 mm-0.3 mm Optionally, thesealing layer may be polyester resin (PET), polypropylene (PP) and thelike, so as to achieve the sealing of the isolation member 13. It shouldbe understood that the way of setting the sealing layer here may be toseal the aforementioned PET or PP material at the position of the holeof the exhaust hole, and the embodiment of the present application doesnot limit the specific implementation manner.

As an embodiment, under the condition that the first plate 131 isprovided with the first exhaust hole 1311, the second vent 1321 may notbe provided on the second plate 132. Optionally, a weakened zone can beformed by thinning the zone corresponding to the first exhaust hole1311, so that the emissions from the pressure relief mechanism 213breaks through the weakened zone and is discharged into the collectionchamber 11 b. Specifically, a thickness of a region of the second plate132 corresponding to the first exhaust hole 1311 is less than athickness of other regions of the second plate 132.

A position of the second plate 132 corresponding to the first exhausthole 1311 is provided with a smaller thickness, such that the internaltemperature or pressure of the pressure relief mechanism 213 can breakthrough the isolation component 13 more easily and enter the collectionchamber 11 b.

In addition to the above-mentioned form of providing exhaust holes onthe bottom wall of the recess 134, the embodiment of the presentapplication can also provide a weakened zone on the bottom wall of therecess 134 such that the internal pressure or temperature of thepressure relief mechanism 213 can break through the isolation member 13and enter the collection chamber 11 b.

As an implementation manner, as shown in FIG. 8 , FIG. 8 is a schematicdiagram of the weakened zone 135 provided on the bottom wall of therecess 134 in the embodiment of the present application. When theweakened zone 135 is disposed on the bottom wall, since the bottom wallof the recess 134 is weaker than other regions of the isolationcomponent 13, it is easily damaged by the emissions. When the pressurerelief mechanism 213 is actuated, the emissions can break the bottomwall of the recess 134 and enter the collection chamber 11 b.

When the weakened zone 135 is provided, optionally, the first plate 131and the second plate 132 are not provided with exhaust holes, but areprovided at the same time to form the weakened zone 135. Or optionally,the first plate 131 may be provided with a first exhaust hole 1311, andthe second plate 132 is provided with a weakened zone 135 instead of asecond exhaust hole 1321 at the region corresponding to the recess 134.In this way, after the first plate 131 and the second plate 132 areconnected, a weakened zone 135 is formed on the bottom wall of therecess 134 to facilitate the emissions of the pressure relief mechanism213 to break through the isolation component 13.

It should be understood that the bottom wall of the recess 134 can bethinned by other thinning methods. For example, a blind hole or astepped hole formed in the first region 131 a of the first plate 131;and/or a blind hole is formed in the second plate.

In an embodiment of the present application, a thickness of the weakenedzone 135 is less than or equal to 3 mm. For example, the thickness ofthe weakened zone 135 may be 1 mm or less.

In addition to the weakened zone 135 with a smaller thickness, aweakened zone 135 made of a low-melting-point material may also be usedto facilitate the melting thereof by the emissions. That is, theweakened zone 135 may have a lower melting point than the rest part ofthe isolation component 13. For example, the material of the weakenedzone 135 has a melting point below 400° C.

It should be understood that the weakened zone 135 may be configured tobe made of a low-melting-point material and with a smaller thickness.That is, the foregoing two implementation manners may be implementedalone or in combination.

According to the above description, the isolation component 13 may bedamaged when the pressure relief mechanism 213 is actuated, such thatthe fluid is discharged from the inside of the isolation component 13.In an embodiment of the present application, a part of the isolationcomponent 13 around the weakened zone 134 may be damaged by theemissions of the battery cell 20 provided with the pressure reliefmechanism 213, such that the fluid is discharged from the inside of theisolation component 13.

Specifically, when the isolation component 13 is provided with a recess134, a side surface of the recess 134 can be damaged by the emissions ofthe battery cell 20 provided with the pressure relief mechanism 213,such that the fluid is discharged from the inside of the isolationcomponent 13.

In the case of adopting the recess 134, when the pressure reliefmechanism 213 is actuated, the emissions of the battery cell 20 rushinto the recess 134. Since the bottom wall of the recess 134 isrelatively weak, the emissions will damage the bottom wall of the recess134 and enter the collection chamber 11 b. In addition, the emissionsrushing into the recess 134 also melt the side face of the recess 134,so that the fluid is discharged from the inside of the isolationcomponent 13, thereby cooling the hot emissions.

As an embodiment, a side wall of the recess 134 is an inclined plane.This can increase the contact area with the emissions and facilitate thedamage by the emissions. For example, an inclination angle of the sideface of the recess 134 (an included angle between the side face and theplane where the bottom wall is located) may be in the range from 15° to85°.

Or, as another embodiment, the side wall of the recess 134 may be avertical surface, but the application is not limited thereto.

As an embodiment, when the pressure relief mechanism 213 described abovein the embodiment of the present application is actuated, the emissionsenter the collection chamber 11 b through the isolation component 13. Inorder to further reduce the influence of the emissions on the externalenvironment, the isolation component 13 of the embodiment of the presentapplication may also be provided with a second through hole 144, and theemissions that enters the collection chamber 11 b may be dischargedthrough the second through hole.

Specifically, the emissions may be in communication with the exhaustchannel through the second through hole 144, and finally discharged outof the box 11 though the exhaust channel. By providing the secondthrough hole 144 on the isolation component 13, which can further extendthe path of discharging the emissions, further reduce the temperature ofthe exhaust, thereby reducing the influence of the emissions on theexternal environment of the battery 10.

Since the recess 134 in the embodiment of the present application maycorrespond to the plurality of pressure relief mechanisms 213 of theplurality battery cells 20 of the battery cell group 200, the emissionsof the plurality pressure relief mechanisms 213 are all dischargedthrough the recess 134. In this case, when the pressure relief mechanism213 of one battery cell 20 is activated, its emissions may impact theadjacent battery cells 20, causing the adjacent battery cells 20 to bedamaged. On such basis, the battery box body of in the embodiment of thepresent application may further include a gas blocking bar. By providingthe gas blocking bar, the mutual influence among the adjacent batterycells 20 is reduced.

FIG. 11 shows a schematic diagram of an isolation component providedwith a gas blocking bar according to an embodiment of the presentapplication. As shown in FIG. 11 , the recess 134 in the embodiment ofthe present application may further include at least one gas blockingbar 141. The gas blocking bar 141 is disposed on the bottom wall of therecess 134, and the gas blocking bar 141 is configured to divide therecess 134 into at least two spaces along the first direction.

Optionally, there are a plurality of the gas blocking bars 141, and theplurality of gas blocking bars 141 are arranged along the firstdirection, such that the gas blocking bar is arranged between the twoadjacent pressure relief mechanisms 213.

As an embodiment, the plurality of gas blocking bars 141 may divide therecess 134 into a plurality of spaces along the first direction, and theplurality of spaces may in one-to-one correspondence with the pressurerelief mechanisms 213 of the plurality of battery cells 20. In this way,the mutual influence among each pressure relief mechanism 213 can bereduced, and the emissions of the pressure relief mechanism 213 of onebattery cell 20 can be prevented from impacting the adjacent batterycells 20.

Correspondingly, the two side walls of the recess 134 in the embodimentof the present application along the second direction may be providedwith notches, such as the notch 1342 shown in FIG. 10 a , and the gasblocking bar 141 may be disposed in the above-mentioned notch 1342. Byproviding a notch 1342 disposed with the gas blocking bar 141 on theisolation component 13, the gas blocking bar 141 can be quicklypositioned, and so that the installation is simpler and more convenient.Or, the gas blocking bar 141 can also be directly pasted on the bottomwall of the recess 134, which is not limited in this application.

It should be understood that the shape of the gas blocking bar in theembodiment of the present application can be set according to actualconditions. FIG. 12 shows a schematic diagram of gas blocking bar in anembodiment of the present application. As shown in FIG. 12 , the gasblocking bar 141 may be a structure that the middle portion is low andthe two side portions are high, where the higher portions at both sidescan match the notch 1342 provided at the outside of the recess 134,thereby achieving the positioning of the gas blocking bar 141. Undersuch condition, after the installation, the height of the gas blockingbar is lower than the depth of the recess 134. And the pluralities ofspaces separated by the gas blocking bar are not completely isolatedfrom each other.

Or, the gas blocking bar 141 can also be provided in a regular elongatedshape, which can be directly pasted on the bottom wall of the recess 134without providing a notch 1342. The shape of the gas blocking bar 141 isnot limited in the embodiment of the present application.

As an embodiment, the gas blocking bar 141 is made of a compressiblematerial, and after the installation is completed, the gas blocking bar141 is compressed by the first wall 21 a and the bottom wall of therecess 134.

In order to achieve the fixation between the battery cell 20 and theisolation component 13, an adhesive needs to be used between the two.Since the adhesive is easy to flow, it is likely to overflow into therecess 134 of the isolation component 13, in order to prevent theadhesive from entering the recess 134, as shown in FIG. 13 , a blockingmember 142 may be provided the outside of the opening of the recess 134in the second direction. The cross-sectional view of FIG. 9 c also showsthe blocking member 142. The blocking member 142 is configured toprevent the adhesive from entering the recess, where the adhesive isused to fix the first wall 21 a to the isolation component 13 a.

As an embodiment, the blocking member 142 in the embodiment of thepresent application may be a rubber blocking strip.

Optionally, the blocking member 142 in the embodiment of the presentapplication may be elongated or in the shape of a mouth, as shown inFIG. 14 , but it should be understood that the blocking member 142 inthe present application is to prevent the adhesive from entering therecess 143, and its specific shape of which can be set according to theactual situation, to which the embodiments of the present application isnot limited thereto.

Optionally, the surface that is close to the battery cell group 200 inthe embodiment of the present application may be provided with a secondrecess, such as the second recess 1343 as shown in FIG. 10 , and thesecond recess 1343 is arranged along the first direction and is locatedat the outside of the opening of the recess 134 along the seconddirection. The second recess 1343 is configured to accommodate the aboveblocking component 134. Or, optionally, the blocking component 142 mayalso be directly disposed at the outside of the opening of the recess134 along the first direction, and there is no need to provide a secondrecess 1343, which is not limited in this application.

The blocking component 142 in the embodiment of the present applicationmay be made of a compressible material, and the blocking component 142may be compressed by the surface of the isolation component 13 close tothe battery cell group 200 and the bottom wall of the second recess1343. Optionally, a thickness of the blocking component 142 can bedetermined according to the compressibility of the compressiblematerial. By providing the blocking component 142, on the one hand, theadhesive can be prevented from entering the recess 134, and at the sametime, the flatness tolerance of the isolation component 13 can beabsorbed, and the thickness of the glue layer at different positions canbe adjusted.

Optionally, in an embodiment of the present application, the isolationcomponent 13 is provided with a wall shared by the electrical chamber 11a and the collection chamber 11 b. As shown in FIG. 15 , the isolationcomponent 13 may be both a wall of the electrical chamber 11 a and awall of the collection chamber 11 b. That is, the isolation component 13(or a part thereof) may directly serve as a wall shared by theelectrical chamber 11 a and the collection chamber 11 b. In this way,the emissions from the plurality of battery cells 20 of the battery cellgroup 200 may enter the collection chamber 11 b through the isolationcomponent 13. Meanwhile, due to the existence of the isolation component13, the emissions may be isolated from the electrical chamber 11 a asfar as possible, thereby reducing the risk of the emissions andenhancing the safety of the battery.

Optionally, in an embodiment of the present application, the electricalchamber 11 a may be composed of a covering with an opening, and anisolation component 13. For example, as shown in FIG. 16 , the box 11further includes a covering 110 with an opening (an opening at the lowerside in FIG. 16 ). The covering 110 with the opening is a semi-closedchamber with an opening in communication with the outside, and theisolation component 13 covers the opening to form a chamber, i.e., anelectrical chamber 11 a.

Optionally, the covering 110 may be composed of a plurality portions.For example, as shown in FIG. 15 , the covering 110 may include a firstportion 111 and a second portion 112. Openings are provided on two sidesof the second portion 112 respectively. The first portion 111 covers theopening on one side of the second portion 112, and the isolationcomponent 13 covers the opening on the other side of the second portion112, thus the electrical chamber 11 a is formed.

The embodiment of FIG. 17 may be obtained through improvements on thebasis of FIG. 2 . Specifically, a bottom wall of the second portion 112in FIG. 2 may be replaced with the isolation component 13, and theisolation component 13 acts as a wall of the electrical chamber 11 a,thus the electrical chamber 11 a in FIG. 17 is formed. In other words,the bottom wall of the second portion 112 in FIG. 2 can be removed. Thatis, an annular wall with two opening sides is formed, and the firstportion 111 and the isolation component 13 cover the openings on the twosides of the second portion 112 respectively to form a chamber, namelyan electrical chamber 11 a.

Optionally, in an embodiment of the present application, the collectionchamber 11 b may be composed of an isolation component 13 and aprotective member. For example, as shown in FIG. 18 , the box 11 furtherincludes a protective member 115. The protective member 115 isconfigured to protect the isolation component 13, and the collectionchamber 11 b is formed with the protective member 115 and the isolationcomponent 13.

The collection chamber 11 b formed with the protective member 115 andthe isolation component 13 does not occupy the space that mayaccommodate the battery cells. Therefore, the collection chamber 11 bwith a larger space therein can be provided, which may effectivelycollect and buffer the emissions and reduce the risk resultingtherefrom.

Optionally, in an embodiment of the present application, a fluid, suchas a cooling medium, may be further provided in the collection chamber11 b, or a component for accommodating the fluid may be provided tofurther cool the emissions entering the collection chamber 11 b.

Optionally, in an embodiment of the present application, the collectionchamber 11 b may be a sealed chamber. For example, the connectionbetween the protective member 115 and the isolation component 13 may besealed by a sealing member.

Optionally, in an embodiment of the present application, the collectionchamber 11 b may not be a sealed chamber. For example, the collectionchamber 11 b may be in communication with the air, so that a part of theemissions can be further discharged to the outside of the box 11.

In the foregoing embodiment, the opening of the covering 110 is coveredby the isolation component 13 to form an electrical chamber 11 a, andthe collection chamber 11 b is formed with the isolation component 13and the protective member 115. Optionally, the isolation component 13may also directly separate the closed covering into the electricalchamber 11 a and the collection chamber 11 b.

For example, as shown in FIG. 19 , in an embodiment of the presentapplication, the box 11 further includes a closed covering 110. Theisolation component 13 is disposed inside the covering 110 and separatesthe inside of the covering 110 into the electrical chamber 11 a and thecollection chamber 11 b. That is, a chamber is formed inside the closedcovering 110, and the isolation component 13 separates the chamberinside the covering 110 into two chambers, namely the electrical chamber11 a and the collection chamber 11 b.

Since the electrical chamber 11 a needs a relatively large space toaccommodate a plurality of battery cells 20, etc., the isolationcomponent 13 may be provided a position near a certain wall of thecovering 110 to isolate the electrical chamber 11 a with a relativelylarge space from the collection chamber 11 b with a relatively smallspace.

Optionally, as shown in FIG. 20 , in an embodiment of the presentapplication, the covering 110 may include a first portion 111 and asecond portion 112. A side of the second portion 112 is provided with anopening to form a semi-closed structure. The semi-closed structure is achamber with an opening. The isolation component 13 is provided insidethe second portion 112, and the first portion 111 covers the opening ofthe second portion 112. In other words, the isolation component 13 canbe first placed in the semi-closed second portion 112 to isolate thecollection chamber 11 b, and then the first portion 111 covers theopening of the second portion 112 to form the electrical chamber 11 a.

Optionally, in an embodiment of the present application, the electricalchamber 11 a is isolated from the collection chamber 11 b by theisolation component 13. That is, the collection chamber 11 b is not incommunication with the electrical chamber 11 a, and liquid or gas, andlike in the collection chamber 11 b cannot enter the electrical chamber11 a, so that the electrical chamber 11 a can be better protected.

When the pressure relief mechanism 213 is actuated, the pressure reliefmechanism 213 is opened to discharge the emissions of the battery cell20. The emissions may damage the isolation component 13, and thus passthrough the isolation component 13 and enter the collection chamber 11b.

FIG. 21 is a schematic structural diagram of a battery 10 in anembodiment of the present application. The battery 10 may include a box11, a battery cell group 200, and a bus component 12.

The battery cell group 200 includes a plurality of battery cells 20,where the battery cell 20 includes a pressure relief mechanism 213, thepressure relief mechanism 213 is configured to be actuated when theinternal pressure or temperature of the battery cell 20 provided withthe pressure relief mechanism 213 reaches a threshold, to relieve theinternal pressure or temperature.

The bus component 12 is configured to implement electric connectionamong the plurality of battery cells 20.

The box 11 is a box 11 described in the foregoing embodiments, and theelectrical chamber 11 a of the box 11 is configured to accommodate thebattery cells 20, where the collection chamber 11 b of the box 11collects the emissions of the battery cell 20 provided with the pressurerelief mechanism 213, when the pressure relief mechanism 213 isactuated.

FIG. 22 is an exploded view of a battery 10 according to an embodimentof the present application. In the embodiment shown in FIG. 19 , theisolation component 13 is provided with a recess 134, and a collectionchamber is formed with the isolation component 13 and a protectivemember 115.

For the description of each component in the battery 10, reference canbe made to the foregoing embodiments, which will not be repeated herefor brevity.

An embodiment of the present application further provides a powerconsumption apparatus, which may include the battery 10 in each of theforegoing embodiments. Optionally, the power consumption apparatus maybe a vehicle 1, a ship or a spacecraft.

The box of the battery, the battery and the power consumption apparatusaccording to the embodiments of the present application are describedabove, and a method and apparatus for preparing a battery according tothe embodiments of the present application will be described below. Forthe parts not described in detail, reference can be made to theforegoing embodiments.

FIG. 23 shows a schematic flowchart of a method 300 for producing abattery according to an embodiment of the present application. As shownin FIG. 23 , the method 300 may include:

S310, providing a battery cell group 200, where the battery cell group200 includes a plurality of battery cells 20 arranged along a firstdirection, at least two battery cells 20 of the plurality of batterycells 20 includes a pressure relief mechanism 213, the pressure reliefmechanism 213 is disposed on a first wall 21 a of the battery cell 20,and the pressure relief mechanism 213 is configured to be actuated wheninternal pressure or a temperature of the battery cell 20 reaches athreshold value to relieve the internal pressure;

S320, providing a box 11, where the box includes: an electrical chamber11 a, configured to accommodate the battery cell group 200; a collectionchamber 11 b, configured to collect emissions of the battery cell 20provided with the pressure relief mechanism 213 when the pressure reliefmechanism 213 is actuated; an isolation component 13 for isolating theelectrical chamber 11 a and the collection chamber 11 b, such that theelectrical chamber 11 a and the collection chamber 11 b are arranged atboth sides of the isolation component 13; and

S330, where the first wall is attached to the isolation component, asurface of the isolation component 13 that is close to the battery cellgroup 200 is provided with an avoidance opening, the avoidance openingextends along the first direction, and the plurality of pressure reliefmechanisms 213 of the battery cell group 200 face the avoidance opening.

FIG. 24 shows a schematic block diagram of an apparatus 400 forproducing a battery according to an embodiment of the presentapplication. As shown in FIG. 24 , the apparatus 400 for producing abattery may include: a first provision module 410, a second provisionmodule 420 and an installation module 430.

The first provision module 410 is configured to provide a battery cellgroup, where the battery cell group includes a plurality of batterycells arranged along a first direction, the battery cell includes apressure relief mechanism, the pressure relief mechanism is disposed ona first wall of the battery cell, and the pressure relief mechanism isconfigured to be actuated when internal pressure or a temperature of thebattery cell reaches a threshold value to relieve the internal pressure.

The second provision module 420 is configured to provide a box, wherethe box includes: an electrical chamber, configured to accommodate thebattery cell group; a collection chamber, configured to collectemissions of the battery cell provided with the pressure reliefmechanism when the pressure relief mechanism is actuated; an isolationcomponent for isolating the electrical chamber and the collectionchamber, such that the electrical chamber and the collection chamber arearranged on both sides of the isolation component.

The installation module 430 is configured to provide an avoidanceopening at a surface of the isolation component that is close to thebattery cell group, where the avoidance opening extends along the firstdirection, and the plurality of pressure relief mechanisms of thebattery cell group face the avoidance opening.

Although the present application is already described with reference tothe preferred embodiments, various improvements may be made to thepresent application and the components therein may be replaced withequivalents without departing from the scope of the present application.In particular, as long as there is no structural conflict, varioustechnical features mentioned in the various embodiments may be combinedin any manner. The present application is not limited to the specificembodiments disclosed herein, and includes all technical solutionsfalling within the scope of the claims.

What is claimed is:
 1. A box of a battery, comprising: an electricalchamber, configured to accommodate a battery cell group, wherein thebattery cell group comprises a plurality of battery cells arranged alonga first direction, the plurality of battery cells comprise a firstbattery cell and a second battery cell, the first battery cell comprisesa first pressure relief mechanism, the second battery cell comprises asecond pressure relief mechanism, the first pressure relief mechanism isdisposed on a first wall of the first battery cell, the second pressurerelief mechanism is disposed on a first wall of the second battery cell;a collection chamber, configured to collect emissions of the firstbattery cell and/or second battery cell when the first pressure reliefmechanism and/or the second pressure relief mechanism is actuated; anisolation component, configured to isolate the electrical chamber fromthe collection chamber, such that the isolation component is between theelectrical chamber and the collection chamber; wherein the first wall ofthe first battery cell and the first wall of the second battery cell areattached to the isolation component, a surface of the isolationcomponent that is close to the battery cell group is provided with acontinuous avoidance opening, the continuous avoidance opening extendsalong the first direction and covers the first pressure relief mechanismand the second pressure relief mechanism along the first direction, andthe first pressure relief mechanism and the second pressure reliefmechanism face and correspond to the continuous avoidance opening. 2.The box according to claim 1, wherein the continuous avoidance openingis configured to provide a deformation space for the first pressurerelief mechanism and/or the second pressure relief mechanism, such thatthe first pressure relief mechanism and/or the second pressure reliefmechanism deforms and ruptures towards a direction that is close to theisolation component when the first pressure relief mechanism and/or thesecond pressure relief mechanism is actuated.
 3. The box according toclaim 1, wherein the continuous avoidance opening is a recess or athrough hole.
 4. The box according to claim 3, wherein a width of thecontinuous avoidance opening along a second direction is greater than awidth of the first pressure relief mechanism and/or the second pressurerelief mechanism along the second direction, wherein the seconddirection is perpendicular to the first direction.
 5. The box accordingto claim 3, when the continuous avoidance opening is a recess, a bottomwall of the recess is provided with an exhaust hole, and the emissionsof the first battery cell and/or the second battery cell enter thecollection chamber through the exhaust hole.
 6. The box according toclaim 3, wherein the box comprises a gas blocking bar, the gas blockingbar is disposed at the bottom wall of the recess, and the gas blockingbar is configured to divide the recess into two spaces along the firstdirection.
 7. The box according to claim 6, wherein the gas blocking baris arranged between the first pressure relief mechanisms and the secondpressure relief mechanism.
 8. The box according to claim 3, wherein ablocking member is provided at an outer side of an opening of the recessalong the second direction, and the blocking member is configured toblock an adhesive from entering the recess, wherein the adhesive isconfigured to fix the first wall to the isolation component, and thesecond direction is perpendicular to the first direction.
 9. The boxaccording to claim 8, wherein a second recess is provided at the surfaceof the isolation component that is close to the battery cell group, andthe second recess extends along the first direction and is located atthe outer side of the opening of the recess along the second direction,and the second recess is configured to accommodate the blocking member.10. The box according to claim 1, wherein inside of the isolationcomponent is provided with a flow channel, and the flow channel isconfigured to contain a fluid such that the isolation component adjuststhe temperature for the first battery cell and/or the second batterycell; wherein the isolation component is configured to damage when thefirst pressure relief mechanism and/or the second pressure reliefmechanism is actuated, such that the fluid is discharged from inside ofthe isolation component.
 11. The box according to claim 3, wherein theisolation component comprises a first plate and a second plate, thefirst plate is located at one side of the second plate that is close tothe electrical chamber and attached to the first wall of the firstbattery cell and the first wall of the second battery cell, a firstregion of the first plate is recessed towards the second plate to formthe recess, and the first region is connected to the second plate. 12.The box according to claim 11, wherein the first region is provided witha first exhaust hole, and the first exhaust hole is disposed opposite tothe first pressure relief mechanism or the second pressure reliefmechanism.
 13. The box according to claim 12, wherein the second plateis provided with a second exhaust hole at a position corresponding tothe first exhaust hole.
 14. The box according to claim 12, wherein thefirst exhaust hole is sealed by a first sealing layer and/or the secondexhaust hole is sealed by a second sealing layer.
 15. The box accordingto claim 12, wherein a thickness of a region of the second platecorresponding to the first exhaust hole is less than a thicknesses ofother regions of the second plate.
 16. The box according to claim 5,wherein a weakened zone is provided at a bottom wall of the continuousavoidance opening, the weakened zone is configured to damage by theemissions discharged from inside of the first battery cell and/or thesecond battery cell when the first pressure relief mechanism and/or thesecond pressure relief mechanism is actuated, such that the emissionsenter the collection chamber through the weakened zone; wherein athickness of the weakened zone is less than or equal to 3 mm.
 17. Thebox according to claim 1, wherein the isolation component is providedwith a second through hole, and the emissions are discharged through thesecond through hole.
 18. A battery, comprising: a battery cell group,wherein the battery cell group comprises a plurality of battery cellsarranged along a first direction, the plurality of battery cellscomprise a first battery cell and a second battery cell, the firstbattery cell comprises a first pressure relief mechanism, the secondbattery cell comprises a second pressure relief mechanism, the firstpressure relief mechanism is disposed on a first wall of the firstbattery cell, the second pressure relief mechanism is disposed on afirst wall of the second battery cell, and, a box of the battery,wherein the box comprising: an electrical chamber, configured toaccommodate a battery cell group; a collection chamber, configured tocollect emissions of the first battery cell and/or the second batterycell when the first pressure relief mechanism and/or the second pressurerelief mechanism is actuated; an isolation component, configured toisolate the electrical chamber from the collection chamber, such thatthe isolation component is between the electrical chamber and thecollection chamber; wherein the first wall of the first battery cell andthe first wall of the second battery cell are attached to the isolationcomponent, a surface of the isolation component that is close to thebattery cell group is provided with a continuous avoidance opening, thecontinuous avoidance opening extends along the first direction andcovers the first pressure relief mechanism and the second pressurerelief mechanism along the first direction, and the first pressurerelief mechanism and the second pressure relief mechanism face andcorrespond to the continuous avoidance opening.
 19. A power consumptiondevice, comprising a battery, wherein the battery comprising: a batterycell group, wherein the battery cell group comprises a plurality ofbattery cells arranged along a first direction, the plurality of batterycells comprise a first battery cell and a second battery cell, the firstbattery cell comprises a first pressure relief mechanism, the secondbattery cell comprises a second pressure relief mechanism, the firstpressure relief mechanism is disposed on a first wall of the firstbattery cell, the second pressure relief mechanism is disposed on afirst wall of the second battery cell; and, a box of the battery,wherein the box comprising: an electrical chamber, configured toaccommodate a battery cell group; a collection chamber, configured tocollect emissions of the first battery cell and/or second battery cellwhen the first pressure relief mechanism and/or the second pressurerelief mechanism is actuated; an isolation component, configured toisolate the electrical chamber from the collection chamber, such thatthe isolation component is between the electrical chamber and thecollection chamber; wherein the first wall of the first battery cell andthe first wall of the second battery cell attached to the isolationcomponent, a surface of the isolation component that is close to thebattery cell group is provided with a continuous avoidance opening, thecontinuous avoidance opening extends along the first direction andcovers the first pressure relief mechanism and the second pressurerelief mechanism along the first direction, and the first pressurerelief mechanism and the second pressure relief mechanism face andcorrespond to the continuous avoidance opening.
 20. The box according toclaim 1, wherein a second wall of the first battery cell is providedwith electrode terminals, a second wall of the second battery cell isprovided with electrode terminals, and the second wall is different fromthe first wall.